pc: disable the BOCHS BIOS panic port

We have an OS which writes to port 0x400 when probing for special hardware.
This causes an exit of the VM. With SeaBIOS this port isn't used anyway.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-By: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Bernhard Kohl <bernhard.kohl@nsn.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

diff --git a/hw/pc.c b/hw/pc.c
index c34d194..119c110 100644 (file)
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -430,8 +430,8 @@ static void bochs_bios_write(void *opaque, uint32_t addr, uint32_t val)
         /* Bochs BIOS messages */
     case 0x400:
     case 0x401:
-        fprintf(stderr, "BIOS panic at rombios.c, line %d\n", val);
-        exit(1);
+        /* used to be panic, now unused */
+        break;
     case 0x402:
     case 0x403:
 #ifdef DEBUG_BIOS